CN201336032Y - Software simulation serial data transmission device - Google Patents
Software simulation serial data transmission device Download PDFInfo
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- CN201336032Y CN201336032Y CNU2009200954122U CN200920095412U CN201336032Y CN 201336032 Y CN201336032 Y CN 201336032Y CN U2009200954122 U CNU2009200954122 U CN U2009200954122U CN 200920095412 U CN200920095412 U CN 200920095412U CN 201336032 Y CN201336032 Y CN 201336032Y
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Abstract
The utility model discloses a software simulation serial data transmission device. The device comprises a software serial interface module and a soft core RS232 interface module, wherein, the software serial interface module is used for transmitting the SPI data with an SPI device and transmitting the SPI data with a soft core RS232 interface module; and the soft core RS232 interface module is used for transmitting the RS232 signal data with a RS232 device, transmitting the SPI data with the software serial interface module and mutually converting speed rates of the received RS232 signal and the SPI data. The utility model syncretizes the serial conversion technology with the software module control and transmission technology into a whole, is suitable for specific two-wire system and three-wire system serial data transmission occasions, has the advantages of high speed of data transmission and high reliability at the same time, and effectively meets the requirements of serial data transmission and serial data buffer in different clock zones by adopting an FPGA chip as a carrier of the software module.
Description
Technical field
The utility model relates to technical field of data transmission, particularly relates to a kind of software simulation serial data transmission device.
Background technology
Serial peripheral interface (Serial Peripheral Interface, SPI) bus system comprises spi bus, internal integrated circuit (Inter Integrated Circuit, I2C) bus etc., it is a kind of synchronous serial Peripheral Interface, can make microcontroller (Micro Controller Unit, MCU) communicate with exchange message with serial mode with various peripherals, its outer periphery is equipped with equipment such as FLASHRAM (flash memory), network controller, LCD display driver, A/D converter and MCU.
Use the serial peripheral interface spi bus system of software simulation can be directly and the interface of the multiple standards peripheral components of each manufacturer production compatibility mutually, this interface can be three-way or the four-wire system interface: but the four-wire system interface must comprise serial time clock line (SCK), main frame input/slave output data line MISO, main frame output/slave input data line MOST and the effective slave selection wire of low level SS, and the three-wire system interface must comprise clock line, data line and condition line.The hardware serial line interface is a module on a lot of processors, but the serial line interface poor compatibility on the hardware, for some special peripheral components as three-wire system flash memory FLASH, real-time clock, modulus (AD) converter, digital signal decoders etc. can't be realized serial data communication, and at this moment software simulation three-wire system serial line interface just demonstrates its advantage flexibly.
And RS-232 is one of communication interface on the personal computer, by Electronic Industries Association (ElectronicIndustries Association, the asynchronous transmission standard interface of EIA) being formulated.Usually RS-232 interface occurs with 9 pins (DB-9) or the kenel of 25 pins (DB-25), has two groups of RS-232 interface on the general personal computer, is called COM1 and COM2.
RS-232-C is a kind of serial physical interface standard that the EIA of EIA (Electronic Industry Association) formulates.RS is the abbreviation of English " proposed standard ", and 232 is identification number, and C represents to revise number of times.The RS-232-C bus standard is provided with 25 signal line altogether, comprises a main channel and an accessory channel.Mainly use the main channel as a rule,, only need several signal line just can realize, send line, a reception line and a ground wire as one for general duplex communication.
The message transmission rate of RS-232-C standard code is per second 50,75,100,150,300,600,1200,2400,4800,9600,19200 bauds.
RS-232-C standard code, driver allow the capacitive load of 2500pF, and communication distance will be subjected to this capacitance limits, and for example, when adopting the telecommunication cable of 150pF/m, maximum communication distance is 15m; If the electric capacity of every meter cable reduces, communication distance can increase.Another short reason of transmission range is that RS-232 belongs to single-ended signal and transmits, and has altogether noise and can not suppress problem such as common mode interference, therefore generally is used for 20m with interior communication.
The serial communication interface standard has had several standards at present through using and developing, but all is to form through improving on the basis of rs-232 standard.So, be that the master comes description string row communication interface standard with RS-232C.The RS-323C standard is the communication protocol of announcing in 1969 that U.S. EIA (Electronic Industries Association) develops with companies such as BELL.It is suitable for the communication of message transmission rate in 0～20000b/s scope.This standard all makes explicit provisions as signal wire function, the opering characteristic of electric apparatus to the relevant issues of serial communication interface.Because current instrument factory commercial city produces the communication facilities with the RS-232C multiple display modes compatible, therefore, it extensively adopts in the microcomputer communication interface at present as a kind of standard.
But, the serial data communication major part is all realized by the hardware serial data communication interface of single-chip microcomputer at present, the advantage of himself mainly is presented as: control fairly simplely, can satisfy the requirement and the needs of most data transmission, but himself limitation and shortcoming are also arranged.It has certain requirement to connection object, a lot of peripheral components can not be compatible mutually with the hardware serial line interface on the single-chip microcomputer, because the serial SPI communication interface of a lot of peripheral components, be double wire system be that the output and the incoming line of data is with single line SDATA, clock line is SCLK.And the standard SPI interface on the single-chip microcomputer all is a three-wire system, and promptly the input and output data line respectively accounts for single line, and clock line is SCLK.This has just caused the SPI interface of peripheral serial SPI module and single-chip microcomputer can not be compatible, so also just can't carry out the transmission of serial data.
Therefore, current pressing for developed a kind of software simulation serial data transmission device, goes for the situation of multiple special serial line interface peripheral components, and has the advantage that data rate is fast, reliability is high simultaneously.
The utility model content
In view of this, the purpose of this utility model provides a kind of software simulation serial data transmission device, the serial data interface and the soft nuclear RS232 data transmission that can realize software two-wire system or three-wire system merge one, go for the situation of multiple special serial line interface peripheral components, and have the advantage that data rate is fast, reliability is high simultaneously, be of great practical significance.
For this reason, the utility model provides a kind of software simulation serial data transmission device, includes software serial interface module and soft nuclear RS232 interface module, wherein,
The software serial interface module is connected with serial peripheral interface SPI equipment, be used for and SPI equipment between carry out the transmission of SPI data, and carry out the transmission of SPI data with soft nuclear RS232 interface module;
Soft nuclear RS232 interface module, be connected with RS232 equipment, be used for and RS232 equipment between carry out the data transmission of RS232 signal, and carry out the transmission of SPI data, and received RS232 signal and SPI data carried out the mutual conversion of speed with the software serial interface module.
Preferably, SPI equipment is the plurality of devices with SPI interface, and RS232 equipment is the plurality of devices with RS232 interface.
Preferably, described software serial interface module includes software serial data transmission unit and software transmits and receives the unit, wherein:
Software serial data transmission unit transmits and receives the unit with SPI equipment, software and is connected, and is used for respectively and serial peripheral interface SPI equipment, software transmit and receive the transmission of carrying out the SPI data between the unit;
Software transmits and receives the unit, is connected with software serial data transmission unit, soft nuclear RS232 interface module, is used to launch the SPI data and gives soft nuclear RS232 module, and receive the SPI data that soft nuclear RS232 module is transmitted.
Preferably, described software serial data transmission unit is the soft nuclear embedded scm based on NOIS, and it is based on the standard universal of fpga chip input/output port GPIO able to programme that software transmits and receives the unit.
Preferably, described GPIO is two-wire system or three-wire system interface.
Preferably, described soft nuclear RS232 interface module comprises:
The data buffering temporary storage location, be used to receive the SPI data that soft nuclear RS232 data transmission unit transmits, and be to send to RS232 equipment behind the compatible mutually signal transmission rate of soft nuclear RS232 interface module with the rate transition of this SPI data transmission, and receive the RS232 device transmission the RS232 signal and with the rate transition of this RS232 signal transmission for the software serial interface module in the compatible mutually Frame speed in software serial data transmission unit after be transferred to soft nuclear RS232 data transmission unit;
Soft nuclear RS232 data transmission unit is used for transmitting and receiving the unit with data buffering temporary storage location, soft nuclear RS232 respectively and carries out the SPI data transmission;
Soft nuclear RS232 transmits and receives the unit, and be used to launch the SPI data and give the software serial interface module, and the SPI data that transmitted of receiving software serial interface module.
Preferably, the internal RAM module that described data buffering temporary storage location is a fpga chip, described soft nuclear RS232 data transmission unit is the RS232 transport module of the soft nuclear single-chip microcomputer of NOIS, and it is that the serial ports that is embedded into the NOIS single-chip microcomputer of FPGA receives transmitter unit that described soft nuclear RS232 transmits and receives the unit.
Preferably, to transmit and receive the unit be discrete device for described data buffering temporary storage location, soft nuclear RS232 data transmission unit and soft nuclear RS232; Perhaps integrate.
The technical scheme that is provided by above the utility model as seen, the utility model can realize that the serial data interface of software two-wire system or three-wire system and soft nuclear RS232 data transmission merge one, go for the situation of multiple special serial line interface peripheral components, and have the advantage that data rate is fast, reliability is high simultaneously, be of great practical significance.
Description of drawings
Fig. 1 is the structural representation of a kind of software simulation serial data transmission device of providing of the utility model;
Fig. 2 is the software configuration synoptic diagram of the data transmission unit of a kind of software simulation serial data transmission device of providing of the utility model;
Fig. 3 is the software configuration synoptic diagram of the Data Receiving unit of a kind of software simulation serial data transmission device of providing of the utility model.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with drawings and embodiments.
Fig. 1 is the structural representation of a kind of software simulation serial data transmission device of providing of the utility model, referring to 1, the utility model provides a kind of software simulation serial data transmission device, comprises software serial interface module 101 and soft nuclear RS232 interface module 102, wherein:
Software serial interface module 101 is connected with serial peripheral interface SPI equipment, be used for and SPI equipment between carry out the transmission of SPI data, and carry out the transmission of SPI data with soft nuclear RS232 interface module 102;
Soft nuclear RS232 interface module 102, be connected with RS232 equipment, be used for and RS232 equipment between carry out the data transmission of RS232 signal, and carry out the transmission of SPI data, and received RS232 signal and SPI data carried out the mutual conversion of speed with software serial interface module 101.
Wherein, SPI equipment is: EEPROM, and FLASH, real-time clock, AD converter also has digital signal processor and digital signal decoder etc. to have the equipment of SPI interface.RS232 equipment is: computing machine, terminal, serial printer etc. have the equipment of RS232 interface, that is to say that serial peripheral interface SPI equipment is the plurality of devices with serial line interface, and RS232 equipment is the plurality of devices with RS232 interface.
In the utility model, software serial interface module 101 includes software serial data transmission unit 1011 and software transmits and receives unit 1012, wherein:
Software serial data transmission unit 1011 transmits and receives unit 1012 with SPI equipment, software and is connected, and is used for respectively and serial peripheral interface SPI equipment, software transmit and receive the transmission of carrying out the SPI data between the unit 1012;
Software transmits and receives unit 1012, is connected with software serial data transmission unit 1011, soft nuclear RS232 interface module 102, is used to launch the SPI data and gives soft nuclear RS232 module 102, and receive the SPI data that soft nuclear RS232 module 102 is transmitted.
In the utility model, described software serial data transmission unit 1011 is the soft nuclear embedded scm based on NOIS, software transmit and receive unit 1012 for based on the standard universal of fpga chip input/output port able to programme (General Programable Input Output, GPIO).
On specific implementation, described general programmable input/output port GPIO is preferably two-wire system or three-wire system interface, soft nuclear RS232 interface module 102 is preferably (the Field Programmable GateArray based on FPGA, be field programmable gate array) the embedded soft nuclear RS232 interface module of chip, promptly the utility model is preferably and launches the SPI data by two-wire system or three-wire system interface and give soft nuclear RS232 module 102.And receive the SPI data that soft nuclear RS232 module 102 is transmitted.
In the utility model, soft nuclear RS232 interface module 102 includes: data buffering temporary storage location 1021, soft nuclear RS232 data transmission unit 1022 and soft nuclear RS232 transmit and receive unit 1023, wherein:
Data buffering temporary storage location 1021, with RS232 equipment, soft nuclear RS232 data transmission unit 1022 is connected, be used to receive the SPI data that soft nuclear RS232 data transmission unit 1022 transmits, and be to send to RS232 equipment behind the compatible mutually signal transmission rate of soft nuclear RS232 interface module with the rate transition of this SPI data transmission, and receive the RS232 device transmission the RS232 signal and with the rate transition of this RS232 signal transmission for software serial interface module 101 in the compatible mutually Frame speed in software serial data transmission unit 1011 after be transferred to soft nuclear RS232 data transmission unit 1022;
(1) the internal damping temporary storage location is a ram cell, its degree of depth and read-write control timing can be set, promptly require not simultaneously in read or write speed, the address pointer of read data and the address pointer of write data can be compared, their difference is determining the degree of depth of RAM data storage, and the data that have little time to send to the RS232 serial ports so just can temporarily be preserved in RAM.
(2) software serial interface module 101 and soft nuclear RS232 interface module 102 these two modules data transmission each other are to carry out data transmission by the totalizer and the data forwarding array of soft nuclear single-chip microcomputer, totalizer is by the circulation that moves to left for zone bit, with the data on the data line SDATA by being shifted into or shifting out totalizer.And the deposit data of a byte that will move into or shift out is in ram cell, data in the ram cell are read and data are put into the data forwarding array by the software control data address pointer, utilize the serial ports transmitting/receiving program that the data in the array are sent to 232 serial ports unit.
Soft nuclear RS232 data transmission unit 1022, transmit and receive unit 1023 and be connected with data buffering temporary storage location 1021, soft nuclear RS232, be used for transmitting and receiving unit 1023 with data buffering temporary storage location 1021, soft nuclear RS232 respectively and carry out SPI data transmission (promptly import and/or export);
Soft nuclear RS232 transmits and receives unit 1023, is connected with soft nuclear RS232 data transmission unit 1022, and be used to launch the SPI data and give software serial interface module 101, and the SPI data that transmitted of receiving software serial interface module 101.
On the specific implementation, internal random access memory (the Random Access Memory that described data buffering temporary storage location 1021 is a fpga chip, RAM) module, described soft nuclear RS232 data transmission unit 1022 is the RS232 transport module of the soft nuclear single-chip microcomputer of NOIS, and it is that the serial ports that is embedded into the NOIS single-chip microcomputer of FPGA receives transmitter unit that described soft nuclear RS232 transmits and receives unit 1023.NOIS is the soft karyonide system based on the online programmable chip of altera corp's exploitation.
The RS232 unit transmits the data forwarding of coming in by software simulation SPI interface unit and has the peripherals of RS232 interface to other, and software simulation SPI interface unit carries out software control and sequential control to the data of two-wire system SPI interface peripherals unit transmission, soft nuclear single-chip microcomputer and ram cell utilize inner totalizer and data forwarding array to realize the transfer and the buffer memory of transmission data between two top modules.
Need to prove: it can be discrete device that data buffering temporary storage location 1021, soft nuclear RS232 data transmission unit 1022 and soft nuclear RS232 transmit and receive unit 1023; Perhaps integrate.
In the utility model, described software transmits and receives unit 1012 and comprises that the software serial data sends subelement and the software serial data receives subelement, and concrete software configuration principle is as follows:
The software serial data that transmits and receives in the unit 1012 about software sends subelement, referring to Fig. 2, in soft nuclear single-chip microcomputer, call spi_send () function, the function of this function is for to send whole Frame from universal serial bus, the Timer 0 of at first opening soft nuclear single-chip microcomputer interrupts allowing, and ET0 is that the interruption of Timer 0 allows the position, be 1 o'clock, soft vouching sheet opportunity response Timer 0 overflow interruption.So just get ready, start timer 0, carry out back serial transmission WatchDog Timer and just brought into operation for the serial transmission WatchDog Timer.Software setting SDATA=1, promptly P1.1 is a high level, SCLK=0, promptly P1.1 is a low level, judges with code whether the data bus of external series transport module is idle.Because when the bus of external series transport module is idle, requiring the SDATA line is low level, and when SDATA was high level, the PC program pointer of soft nuclear single-chip microcomputer pointed to the address at local code place, and when SDATA is low level, the PC program pointer of soft nuclear single-chip microcomputer will point to next address.Can guarantee to transmit when serial data bus is idle data like this.And by the transmission beginning of programmed control SS condition line request msg, the response of the data transfer request that circular wait external series module is sent soft nuclear single-chip microcomputer in program.After externally serial module responds, just the transmission of Frame should have been carried out, the value of first array element of the Frame array that will transmit is earlier composed the totalizer A to single-chip microcomputer, and the byte number 8 of an array element is passed to the R3 register, is used for the transmission counting of each byte.
Then that first displacement of the value of first array element is moving in bit register C, program moves to first of the value of first array element on the SDATA line of serial bus interface again, on synchronous clock line SCLK, produce a square-wave pulse then, as the needed synchronizing clock signals of data frame transfer, so just the one digit number certificate is sent to the external series bus module.Software utilize program loop just 8 bit data of first array element be dealt on the SDATA line of serial bus interface, so just finished the data transmission of a byte.At last elements all in the array is sent on the serial data bus by serial bus interface.
The software serial data that transmits and receives in the unit 1012 about software receives subelement, referring to Fig. 3, in the serial data frame reception program of soft nuclear single-chip microcomputer, when the external series bus module produces when interrupting soft nuclear single-chip microcomputer at the SS pin, single-chip microcomputer can enter in the interrupt response function subprogram.In the interrupt response function, call spi_rcv (spi_buffer) function and realize reception serial data frame, this function is by the P1.1 pin of the data bit on the SDATA line by single-chip microcomputer moved on in the C zone bit register, data is being moved into the reception that realizes data bit among the totalizer A by C zone bit register.When 8 bit data on the SDATA line all move among the totalizer A, just finished the reception of byte data frame data, repeat the reception that said process is finished all data bytes then.Whether the end of data frame transfer is that high level decides by judging on the SS line, if on the SS line be high level, the Frame that explanation is issued soft nuclear single-chip microcomputer by module is through with, finish the back single-chip microcomputer in data frame transfer and also the SDATA line will be changed to low level, for the transmission of data next time on the spi bus is got ready.
In sum, unique way of the present utility model is exactly with serial conversion and software module control transmission technological incorporation one, be applicable to two-wire system and three-wire system serial data transmission occasion that some are special, and have data transmission compatibility, advantage that reliability is high simultaneously, the carrier of software module is a fpga chip, effectively satisfies the requirement of serial data transmission, different clock-domains serial data buffering.
(1) software two wires and three-wire system serial data interface in hardware performance be physics separate can select to use that a kind of line system by the user, carry out Data Receiving by soft nuclear single-chip microcomputer between software serial data interface and the RS232 unit and send controlling and the generation of clock signal.
(2) because some peripheral modules are two-wire system SPI serial data interfaces, incompatible with the three-wire system SPI serial data interface on the single-chip microcomputer, can not carry out data communication, so show its singularity.
(3) because Data Transmission Controlling is monolithic processor controlled by soft nuclear, it is temporary at RAM that it can realize transmitting data, prevents data because the clock zone difference is capped, and improved reliability of data transmission.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1, a kind of software simulation serial data transmission device is characterized in that, includes software serial interface module and soft nuclear RS232 interface module, wherein,
The software serial interface module is connected with serial peripheral interface SPI equipment, be used for and SPI equipment between carry out the transmission of SPI data, and carry out the transmission of SPI data with soft nuclear RS232 interface module;
Soft nuclear RS232 interface module, be connected with RS232 equipment, be used for and RS232 equipment between carry out the data transmission of RS232 signal, and carry out the transmission of SPI data, and received RS232 signal and SPI data carried out the mutual conversion of speed with the software serial interface module.
2, software simulation serial data transmission device as claimed in claim 1 is characterized in that, SPI equipment is the plurality of devices with SPI interface, and RS232 equipment is the plurality of devices with RS232 interface.
3, software simulation serial data transmission device as claimed in claim 1 is characterized in that, described software serial interface module includes software serial data transmission unit and software transmits and receives the unit, wherein:
Software serial data transmission unit transmits and receives the unit with SPI equipment, software and is connected, and is used for respectively and serial peripheral interface SPI equipment, software transmit and receive the transmission of carrying out the SPI data between the unit;
Software transmits and receives the unit, is connected with software serial data transmission unit, soft nuclear RS232 interface module, is used to launch the SPI data and gives soft nuclear RS232 module, and receive the SPI data that soft nuclear RS232 module is transmitted.
4, software simulation serial data transmission device as claimed in claim 3, it is characterized in that, described software serial data transmission unit is the soft nuclear embedded scm based on NOIS, and it is based on the standard universal of fpga chip input/output port GPIO able to programme that software transmits and receives the unit.
5, software simulation serial data transmission device as claimed in claim 4 is characterized in that, described GPIO is two-wire system or three-wire system interface.
6, software simulation serial data transmission device as claimed in claim 1 is characterized in that, described soft nuclear RS232 interface module comprises:
The data buffering temporary storage location, be used to receive the SPI data that soft nuclear RS232 data transmission unit transmits, and be to send to RS232 equipment behind the compatible mutually signal transmission rate of soft nuclear RS232 interface module with the rate transition of this SPI data transmission, and receive the RS232 device transmission the RS232 signal and with the rate transition of this RS232 signal transmission for the software serial interface module in the compatible mutually Frame speed in software serial data transmission unit after be transferred to soft nuclear RS232 data transmission unit;
Soft nuclear RS232 data transmission unit is used for transmitting and receiving the unit with data buffering temporary storage location, soft nuclear RS232 respectively and carries out the SPI data transmission;
Soft nuclear RS232 transmits and receives the unit, and be used to launch the SPI data and give the software serial interface module, and the SPI data that transmitted of receiving software serial interface module.
7, software simulation serial data transmission device as claimed in claim 6, it is characterized in that, the internal RAM module that described data buffering temporary storage location is a fpga chip, described soft nuclear RS232 data transmission unit is the RS232 transport module of the soft nuclear single-chip microcomputer of NOIS, and it is that the serial ports that is embedded into the NOIS single-chip microcomputer of FPGA receives transmitter unit that described soft nuclear RS232 transmits and receives the unit.
8, software simulation serial data transmission device as claimed in claim 6 is characterized in that, it is discrete device that described data buffering temporary storage location, soft nuclear RS232 data transmission unit and soft nuclear RS232 transmit and receive the unit; Perhaps integrate.
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| CNU2009200954122U CN201336032Y (en) | 2009-01-22 | 2009-01-22 | Software simulation serial data transmission device |
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| CNU2009200954122U CN201336032Y (en) | 2009-01-22 | 2009-01-22 | Software simulation serial data transmission device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495818A (en) * | 2011-12-09 | 2012-06-13 | 上海爱信诺航芯电子科技有限公司 | Method for improving communication speed rate of software-mode serial peripheral interface (SPI) |
| CN103236154A (en) * | 2013-03-27 | 2013-08-07 | 深圳创维数字技术股份有限公司 | Infrared serial port communication method and apparatus |
| CN103294625A (en) * | 2012-09-24 | 2013-09-11 | 天津思博科科技发展有限公司 | Realization of acquisition terminal USB interface module for mobile telephone or handheld computer |
| CN103970706A (en) * | 2014-05-14 | 2014-08-06 | 赵美惠 | External expansion system of mobile device based on FT311D interface chip |
| CN104331385A (en) * | 2014-11-26 | 2015-02-04 | 上海爱信诺航芯电子科技有限公司 | High-speed semi-hardware realization method for serial peripheral interface |
| CN107677869A (en) * | 2017-09-25 | 2018-02-09 | 优利德科技(中国)有限公司 | A kind of apparatus and method for improving message transmission rate between SPI interface ADC and MCU |
-
2009
- 2009-01-22 CN CNU2009200954122U patent/CN201336032Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102495818A (en) * | 2011-12-09 | 2012-06-13 | 上海爱信诺航芯电子科技有限公司 | Method for improving communication speed rate of software-mode serial peripheral interface (SPI) |
| CN103294625A (en) * | 2012-09-24 | 2013-09-11 | 天津思博科科技发展有限公司 | Realization of acquisition terminal USB interface module for mobile telephone or handheld computer |
| CN103236154A (en) * | 2013-03-27 | 2013-08-07 | 深圳创维数字技术股份有限公司 | Infrared serial port communication method and apparatus |
| CN103236154B (en) * | 2013-03-27 | 2016-03-02 | 深圳创维数字技术有限公司 | A kind of infrared serial interface communication means and device |
| CN103970706A (en) * | 2014-05-14 | 2014-08-06 | 赵美惠 | External expansion system of mobile device based on FT311D interface chip |
| CN104331385A (en) * | 2014-11-26 | 2015-02-04 | 上海爱信诺航芯电子科技有限公司 | High-speed semi-hardware realization method for serial peripheral interface |
| CN107677869A (en) * | 2017-09-25 | 2018-02-09 | 优利德科技(中国)有限公司 | A kind of apparatus and method for improving message transmission rate between SPI interface ADC and MCU |
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Granted publication date: 20091028 Termination date: 20120122 |